Tried the new rbutil on my e250 after formatting and it works great. First time Autodetect has worked for me. It didn't give me the new bootloader but that came back when I copied the old Rockbox folder back in place. At the speed they're moving I won't be surprised if its in the next current build.

Great work by the Rockbox Team.

you should try it with the new bootloader!. It really is a thing of beauty seeing it boot into RB when you plug in USB